Chapter 6
13. Bill and Jo are both plumbers. Bill charges a $75 fee for a service call plus $25 an hour to
make repairs. Jo charges a $50 fee for a service call plus $30 an hour to make repairs.
Use the graph below to answer the following questions.
•
•
When is it a better deal to hire Bill to make
repairs?
When is it a better deal to hire Jo to make
repairs?
When is it the same cost to hire either
plumber?
the system?
Cost ($)
CCSS
275
250
225
200
175
150
125
100
75
50
25
0
1
2
3
4
5
6 7
Time (Hours)

I’m not sure how to do this problem